_blockSize(blockLength),

_maxAlloc(maxAlloc),

_allocated(preAlloc)

{

poco_assert (maxAlloc == 0 || maxAlloc >= preAlloc);

poco_assert (preAlloc >= 0 && maxAlloc >= 0);

int r = BLOCK_RESERVE;

if (preAlloc > r)

r = preAlloc;

if (maxAlloc > 0 && maxAlloc < r)

r = maxAlloc;

_blocks.reserve(r);

try

{

for (int i = 0; i < preAlloc; ++i)

{

_blocks.push_back(new char[_blockSize]);

}

}

catch (...)

{

clear();

throw;

}

{

for (BlockVec::iterator it = _blocks.begin(); it != _blocks.end(); ++it)

{

delete [] *it;

}

_blocks.clear();

{

FastMutex::ScopedLock lock(_mutex);

try

{

_blocks.push_back(reinterpret_cast<char*>(ptr));

}

catch (...)

{

delete [] reinterpret_cast<char*>(ptr);

}